In light of hundreds of reports of post-race stomach illness last year, Sunday's Rock 'n' Roll Las Vegas Half-Marathon and Marathon will have new water-handling practices in place, the Associated Press reports.

After last year's inaugural event, local health officials recorded 528 cases of a gastrointestinal virus, Sapovirus gastroenteritis. Runners reported diarrhea and vomiting after the race. During the race, gloveless volunteers scooped water or sport drink from open containers lined with plastic sanitary liners, according to the Associated Press. This year, the race has hired a contractor to supply water via closed 125-gallon tanks with spigot hoses.